Gents

We used API 5CT tubing for temporary installation for produced water, oil service etc. These tubing’s has following specs:

1. Sizes: 2-7/8’’, 3-1/2’’, 4-1/2’’
2. Material: L 80 (9Cr, 13Cr)
3. End connections: BC, EU, NU etc
4. Max Pressure: 1200psi
5. Temperature: 220F

In our new project we intend to use API 5CT tubing as flowline. On same crossings, we intend to perform Butt welding of L80 13Cr tubing using following electrode.
1. Using E410NiMo-16 filler wire, SMAW
2. ERNiCrMo3 filler wire, GTAW

Following are question:
-  Does butt welding is acceptable on tubing.
-  Which filler wire is appropriate without PWHT.

Appreciate feedback.